Publications

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Document type: Model Data
Publication Date: May 2012
Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of Michigan, using a customized version of the 2009 IECC as the baseline code without duct testing requirements.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of Minnesota, using a customozed version of the 2006 IECC as the baseline code with lower wall and ceiling insulation levels.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of Mississippi, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of Missouri, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of Montana, using a customized version of the 2009 IECC as the baseline code with R-21 walls and U-0.33 windows.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of Nebraska, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of Nevada, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of New Hampshire, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of New Jersey, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of New Mexico, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of New York, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of North Carolina, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of North Dakota, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of Ohio, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date:
Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of Oklahoma, using a customized version of the 2009 IECC as the baseline code with improved windows in climate zone 3.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of Oregon, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of Pennsylvania, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of Rhode Island, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of South Carolina, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of South Dakota, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of Tennessee, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2011
Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of Texas, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of Utah, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of Vermont, using a customized version of the 2009 IECC as the baseline code with better slab insulation and windows and tighter duct sealing.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of Virginia, using a customized version of the 2009 IECC as the baseline code without duct testing requirements.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of Washington, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of West Virginia, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of Wisconsin, using a customized version of the 2006 IECC as the baseline code with improved wall insulation and windows.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: Model Data
Publication Date: May 2012
Focus: Code Development

The International Energy Conservation Code (IECC) prototype building models (prototype models) were developed by Pacific Northwest National Laboratory (PNNL), in support of DOE's Building Energy Codes Program (BECP), to simulate energy savings associated with changes in energy codes and standards. For residential buildings, PNNL utilized two base prototypes to simulate both Single-family detached house, and Multi-family low-rise apartment building types. Energy models for the 2006, 2009 and 2012 versions of the IECC are available for each state.

This set of IECC Prototype Building Models is for the state of Wyoming, using the 2006 IECC as the baseline code.

Each ZIP file includes EnergyPlus model input files (.idf) and corresponding output files (.html).

Document type: State-specific, Technical Assistance report
Publication Date: January 2007
Focus: Adoption

As of the writing of this report, the state of Illinois does not have a statewide building energy efficiency code for residential buildings, although a number of jurisdictions in Illinois have adopted the 2000 International Energy Conservation Code (IECC) or the 2003 IECC.


The U.S. Department of Energy requested Pacific Northwest National Laboratory estimate the energy savings, economic impacts, and pollution reduction from adopting the 2006 IECC. This report addresses the impacts for low-rise residential buildings only.

Document type: State-specific, Technical Assistance report
Publication Date: September 2002
Focus: Adoption

This study includes the impacts of adopting only the building envelope and lighting requirements of ASHRAE Standard 90.1-1999 and applying it only to new commercial construction. This report builds on a previous study that uses prototypical office, retail, and education buildings to estimate life-cycle cost savings estimates per square foot. Office, retail, and education buildings made up over 60% of the total value of new commercial construction in Illinois in 1997.

Document type: State-specific, Technical Assistance report
Publication Date: April 2004
Focus: Adoption

This report is an update of a previous report, Statewide Savings Projections from the Adoption of a Commercial Building Energy Code in Illinois, completed in September 2002. This updated version incorporates the most recent—as of the writing of this report—gas and electric rates into the analysis.


The results of this analysis suggest that adopting and enforcing a commercial building energy code throughout the state of Illinois could produce substantial energy and cost savings, while reducing emissions of greenhouse gases.

Document type: State-specific
Publication Date:
Focus: Adoption

With respect to the State facilities covered by  71 Ill. Adm. Code 600.Subpart B:

This Part, all additional requirements incorporated within Subpart B (including ASHRAE 90.1 Standards, including all published errata but excluding published supplements that encompass ASHRAE
90.1-2013), and any statutorily authorized adaptations to the incorporated standards adopted by CDB are effective January 1, 2016.

With respect to the privately funded commercial facilities covered by 71 Ill. Adm. Code 600.Subpart C:

This Part, all additional requirements incorporated within Subpart C (including the 2015 International Energy Conservation Code, including all published errata and excluding published supplements that encompass ASHRAE 90.1-2013), and any statutorily authorized adaptations to the incorporated standards adopted by CDB, are effective January 1, 2016.

Document type: State-specific
Publication Date: September 2013
Focus: Adoption

In compliance with Title III of the Energy Conservation and Production Act (ECPA) of 1976, as amended, this is to certify that the State of Illinois has adopted the Illinois Energy Conservation Code, which consists of the 2012 version of the International Energy Conservation Code (IECC) for low-rise residential buildings (with Illinois specific amendments), as well as ASHRAE Standard 90.1-2010 for nonresidential buildings.

Document type: Analysis
Publication Date: October 2016
Focus: Adoption, Compliance, Enforcement

Pacific Northwest National Laboratory (PNNL), funded by DOE, conducted an assessment of the prospective impacts of national model building energy codes from 2010 through 2040. A previous PNNL study evaluated the impact of the Building Energy Codes Program1; this study looked more broadly at overall code impacts. This report describes the methodology used for the assessment and presents the impacts in terms of energy savings, consumer cost savings, and reduced CO2 emissions at the state level and at aggregated levels.

Document type: State-specific, Technical Assistance report
Publication Date: September 2009
Focus: Adoption

This nationwide analysis of commercial energy code compares ASHRAE Standard 90.1-2007 with the commercial code in each state as of June 2009. The results are provided in chapters specific to each state.

States with unique energy codes were not included in the analysis because the codes in these states would be difficult to appropriately compare to ASHRAE Standard 90.1 and most of these states have energy offices that routinely assess their codes against the model codes. In states with codes prior to and including the 2000 IECC or Standard 90.1-1999, those states with no statewide energy code, and home rule states which did not specifically request that another code be used, Standard 90.1-1999 was used as the baseline for comparison.

Three DOE Benchmark buildings were used for the simulation used in this analysis: a medium office building (53,600 ft2), a mid-rise apartment building (33,700 ft2), and a non-refrigerated warehouse (49,500 ft2...

Document type: State-specific, Technical Assistance report
Publication Date: September 2009
Focus: Adoption

This analysis of residential energy code compares the requirements of the 2009 International Energy Conservation Code (IECC) with the residential code—or typical construction practice in the absence of a code—in most states as of June 2009. The results, which include estimated typical energy savings of updating each state’s code to the 2009 IECC, are provided in chapters specific to each state.

Several states have either not adopted a mandatory energy code or developed their own codes which have minimal or no connection to the IECC. The latter—including California, Florida, Oregon, and Washington— were not included in this analysis because the codes in these states would be difficult to appropriately compare to the 2009 IECC and most of these states have energy offices that have already assessed the IECC on their own.

Document type: Reports and Studies
Publication Date: August 2003
Focus: Adoption

A study prepared for E-Star Colorado, the Colorado Governor's Office of Energy Management and Conservation, and The Energy Foundation in order to analyze potential energy savings. The conclusion of the report recommends "adopting and enforcing up-to-date energy codes...and surpassing the energy performance specified by [these] codes."

Document type: Reports and Studies
Publication Date: March 2005
Focus: Compliance

This report assessed commercial building practices to the 2003 International Code Council International Energy Conservation Code (IECC). Plan review and field inspection of 55 new construction commercial buildings determined if the plans complied with the IECC, and if the building was built to the plans and code. Because an energy code had not previously been enforced, personnel were trained to conduct the onsite inspections and collect data on "typical" commercial construction. Compliance issues were identified and documented.

Document type: Technical Articles
Publication Date: May 2009
Focus: Compliance

Insulation installed in a suspended ceiling does not meet the infiltration requirements of the International Energy Conservation Code. When the insulation is on the suspended ceiling, the ceiling is defined as part of the building envelope. This requires that it be air-sealed like any other envelope component.

Document type: Technical Articles
Publication Date: May 2009
Focus: Compliance

The effectiveness of insulation is measured by its R-value - the resistance to heat flow. The higher the R-value, the greater the insulating value. The recommended amount of insulation depends on the building design, climate, price of energy, and cost of materials and labor. Choose insulation materials based on the installed cost per R-value per square foot.

Document type: Code Notes
Publication Date: August 2012
Focus: Compliance

The intent of the pipe insulation requirements is to reduce temperature changes while fluids are being transported through piping associated with heating, cooling or service hot water (SHW) systems, thereby saving energy and reducing operating costs.

Document type: Code Notes
Publication Date: August 2012
Focus: Compliance

The intent of the pipe insulation requirements is to reduce temperature changes while fluids are being transported through piping associated with heating, cooling or service hot water (SHW) systems, thereby saving energy and reducing operating costs.

Document type: State-specific
Publication Date:
Focus: Adoption

The 2009 International Energy Conservation Code, was adopted by reference as the residential energy code of the state of Iowa building code, applicable to residential construction limited to three or fewer stories throughout the state of Iowa, with the amendments outlined in this document.

Document type: State-specific, Technical Assistance report
Publication Date: October 2003
Focus: Adoption

Iowa’s Department of Natural Resources requested that the U.S. Department of Energy (DOE) compare the 1992 Model Energy Code with the 2003 International Energy Code to estimate impacts from updating Iowa's residential energy code to comply with the new code. Under DOE's direction, Pacific Northwest National Laboratory (PNNL) completed an assessment of the impacts from this potential code upgrade, including impacts on construction and energy consumption costs. This report is an update to a similar report completed by PNNL in 2002 that compared the 1992 MEC to the 2000 IECC.

Document type: State-specific
Publication Date: January 2011
Focus: Adoption

One of the main objectives of the Iowa Commission on Energy Efficiency Standards and Practices was to develop recommendations regarding energy efficiency standards for the construction of buildings, incentives to promote energy efficient construction projects, and recommendations regarding the implementation of a building labeling/ rating system for energy efficient buildings. These recommendations represent actions that can be taken to promote energy efficient standards and practices to reduce energy usage and associated building operating costs.

Document type: State-specific
Publication Date: November 2010
Focus: Adoption

On January 3, 2011 the Iowa Department of Public Safety, Division of State Fire Marshal, increased the scope of its energy code plan review. The State Building Code Bureau was awarded a Community Development Block Grant through the U.S. Department of Energy to fund two positions to aid in the enforcement of the State Energy Code. These positions develop energy code enforcement tools and provide energy code outreach to local jurisdictions.

Document type: State-specific
Publication Date: March 2010
Focus: Adoption

This form is to be used by Iowa registered architects and licensed professional engineers to show compliance with Iowa Code 103A.19 and Administrative Rule 661-303.1(3), in the design of buildings which are subject to this law.

Document type: State-specific
Publication Date:
Focus: Adoption

The Iowa state building code commissioner, with the approval of the advisory council, formulates, adopts, amends and/or revises and promulgates reasonable rules designed to establish minimum safeguards in building construction, and establishes regulations to protect the health, safety, and welfare of the public.

Document type: State-specific
Publication Date: September 2012
Focus: Compliance, Enforcement

This Guide is designed to assist state and local code jurisdictions in achieving statewide compliance with the 2006 International Energy Conservation Code (IECC) for residential buildings and ASHRAE Standard 90.1-2007 for commercial buildings.

Document type: State-specific
Publication Date: July 2013
Focus: Adoption

The State of Iowa has adopted the residential energy code requirements of the 2009 International Energy Conservation Code (IECC), effective as of 01/01/10 (Iowa Administrative Code 661 - Chaper 303.2 with reference to Iowa Code section 103A). Iowa has adopted the commercial energy code requrements of the 2009 IECC, effective as of 01/01/10 (Iowa Administrative Code 661 - Chaper 303.3 with reference to Iowa Code section 103A).  ASHRAE Standard 90.1 is adopted by reference for the commercial part of the code in Section 501.2 of the 2009 IECC.

Document type: Proposals
Publication Date: March 2010
Focus: Code Development

The New Buildings Institute (NBI) and American Institute of Architects believe that the 20% to 30% reductions in commercial and high-rise residential building energy use based on this proposal are practical, feasible, and necessary. This proposal employs improvements to design practices and use of widely available products to improve energy efficiency. Many of the elements have been previously published in NBI’s Core Performance Guide and implemented in programs or codes at the local and state levels. Incorporating these enhancements in a model code will help move building practices and markets more quickly, addressing national concerns for energy and the environment in a pragmatic and cost-effective way.

Document type: State-specific
Publication Date: July 2013
Focus: Adoption

In compliance with Title III of the Energy Conservation adn Production Act (ECPA) of 1976, as amended, this is to certify that the Commonwealth of Kentuchy has adopted by reference the 2009 version of the International Energy Conservation Code (IECC) afor low-rise residential builidings, as well as ASHRAE Standard 90.1-2007 for non-residential buildings (by virtue of its reference within the 2009 IECC).

Document type: Code Notes
Publication Date: August 2012
Focus: Compliance

Kitchen and dining facilities use a large amount of energy per floor area. Kitchen exhaust hoods contribute greatly to that energy use. Energy is used both to operate fans and to heat and cool makeup air that is then exhausted.

Document type: Technical Articles
Publication Date: May 2009
Focus: Compliance

Revisions and additions in the 2006 International Energy Conservation Code and ASHRAE Standard 90.1-2004 affect most new building designs. These requirements are mandatory and cannot be traded away, but options and exceptions are provided to meet the needs of various building and space types and activities. The requirements are categorized into two general areas: basic space control and automatic shutoff controls.

Document type: Resource Guide
Publication Date: September 2012
Focus: Adoption, Code Development, Compliance

This guide provides information for anyone dealing with a lighting energy code or standard. It provides background and development information to help readers understand the basis for requirements and their intent. The guide also provides detailed explanations of the major types of requirements such that users can more effectively design to meet compliance while applying the most flexibility possible.

Publication Date: July 2013
Focus: Adoption

The energycode for one- and two-family residential structures in Louisiana is Part IV: Energy Conservation of the 2006 IRC. 2009 IECC is currently being enforced in low-rise, multifamily residential structures. ASHRAE 90.1-2007 is currently enforced for commercial construction.

This letter certifies that ACT 390 of 2013 has been signed by the Governor, and it will update Part IV: Energy Conservation of the 2009 IRC effective January 1, 2014, and that ASHRAE Standard 90.1-2007 is the code  currently enforced by the Louisiana Office of the State Fire Marshal for commercial construction.

Document type: State-specific, Technical Assistance report
Publication Date: December 2006
Focus: Adoption

At the request of the Government Accountability Office, The U.S. Department of Energy's Building Energy Codes Program (BECP) undertook an analysis of the energy savings and cost impacts associated with the use of newer and more efficient commercial building energy codes in the states of Louisiana and Mississippi. BECP looked at three levels of energy standards – ASHRAE Standard 90-75, ASHRAE 90.1-2001, and ASHRAE Standard 90.1-2004 – that cover both the full range of standards currently on the books in Louisiana and Mississippi and the logical next standards for these states.

Document type: State-specific, Technical Assistance report
Publication Date: January 2007
Focus: Adoption

At the request of the Government Accountability Office, the U.S. Department of Energy's Building Energy Codes Program undertook an analysis of the energy savings and cost impacts associated with the use of newer and more efficient residential building energy codes in the states of Louisiana and Mississippi.


The intent of this analysis is to determine the potential energy and economic impacts from improved energy efficiency alternatives available for residential buildings during the reconstruction process after Hurricane Katrina.

Document type: State-specific
Publication Date: October 2009
Focus: Adoption

The Maine Legislature enacted the Uniform Building and Energy Code (PL 2007, Chapter 699 and amendments PL 2009, Chapter 261). This document provides some answers to frequently-asked questions about the code.

Document type: State-specific
Publication Date: July 2013
Focus: Adoption

The State of Maine has adopted building codes for energy efficiency; they are included in the Maine Uniform Building and Energy Code (MUBEC). The State of Maine has adopted the 2009 International Energy Conservation Code, as well as ASHRAE Standard 90.1-2007.  The 2009 IECC is required; ASHRAE Standard 90.1-2007 is included as part of MUBEC, but compliance is not mandatory.

Document type: Reports and Studies
Publication Date: September 2016
Focus: Residential

A research project in the state of Maryland investigated energy code-related aspects of residential single-family new construction. The study was initiated in January 2015 and continued through July 2015. During this period, research teams visited 207 homes during various stages of construction, resulting in a substantial data set based on observations made directly in the field. Analysis of the data has led to a better understanding of the energy features present in homes, and indicates over $1.5 million in potential savings to Maryland homeowners that could result from increased code compliance. Public and private entities within the state can use this information to justify and catalyze future investments in energy code training and related energy efficiency programs.

Document type: State-specific
Publication Date: July 2013
Focus: Adoption

By legislation, the Maryland Building Performance Standards (MPBS) which was adopted in 1994 is updated every three years to coincide with the International Code Council (ICC) change cycle, as the ICC updates their I-codes. The MBPS adopted the 2012 International Energy Conservation Code and ASHRAE 90.1-2010 on January 1, 2012. Maryland legislation requires the State of Maryland to adopt the first printing of the latest International Building Code, International Residential Code and the International Energy Conservation Code within one year of publication by the ICC.

Document type: State-specific
Publication Date: January 2010
Focus: Adoption

In accordance with the statutory requirements of the Green Communities Act, the Board of Building Regulations and Standards amended the Massachusetts Building Code as of January 1, 2010, requiring the use of the 2009 International Energy Conservation Code with Massachusetts amendments.

Document type: State-specific
Publication Date:
Focus: Adoption

780 CMR: MASSACHUSETTS AMENDMENTS TO THE INTERNATIONAL BUILDING CODE 2009: Buildings in the state of Massachusetts shall be designed and constructed in accordance with the 2009 International Energy Conservation Code with Massachusetts Amendments as described in this document:.

Document type: State-specific
Publication Date: July 2013
Focus: Adoption

The Massachusetts Board of Building Regulations and Standards (BBRS) in consultation with the Deparment of Energy Resources has amended the Massachusetts statewide building code in line with the recommendations of the Department of Energy on the following occasions:

On October 17, 2008, the ASHRAE Standard 90.1-2007 was adopted as chapter thirteen of the amended Massachusetts seventh edition building energy code.

On Jauary 1, 2010, the IECC 2009 was adopted and by direct reference the ASHRAE Standards 90.1-2007 was maintained in the amended Massachusetts seventh edition building energy code.

 

Document type: Compliance Tool
Publication Date: October 2010
Focus: Compliance

This document contains a flier and letter templates for use by states.

Example:

Buildings account for roughly 40 percent of the nation’s energy consumption. Enhancing their efficiency will lead to a stronger economy, a cleaner environment, and decreased dependence on imported oil. With this goal in mind, the (state organization), with support from the U.S. Department of Energy’s Building Energy Codes Program (BECP), is asking local jurisdictions to participate in a statewide study to measure compliance rates with building energy codes. This letter is meant to familiarize you with the study and to solicit your support for this important activity.

Document type: Compliance Tool, Reports and Studies
Publication Date: March 2010
Focus: Compliance

In this document, the U.S. Department of Energy's Building Energy Codes Program provides a detailed set of procedures that may help states as they engage in activities in support of code implementation and enforcement as well as measurement of the compliance rate associated with the codes and standards named in legislation, most notably those associated with measuring and reporting rates of compliance.

Document type: Compliance Tool, Reports and Studies
Publication Date: March 2010
Focus: Compliance

To supplement the Measuring State Energy Code Compliance report, this user-friendly action plan summarizes the main procedures, shows further options, and points to several ready-made resources and web-based tools U.S Department of Energy's Building Energy Codes Program is releasing to support the process.

Document type: Code Notes
Publication Date: October 2011
Focus: Compliance

ASHRAE Standard 90.1-2010 and the commercial provisions of the 2012 International Energy Conservation Code require that the building envelope be carefully designed to limit uncontrolled air leakage into and out of the building.

Document type: Technical Support Document
Publication Date: September 2012
Focus: Compliance

This report explains the methodology used to develop Version 4.4.3 of the REScheck software developed for the 1992, 1993, and 1995 editions of the MEC, and the 1998, 2000, 2003, 2006, 2007, 2009, and 2012 editions of the IECC, and the 2006 edition of the International Residential Code (IRC). Although some requirements contained in these codes have changed, the methodology used to develop the REScheck software for these editions is similar. Beginning with REScheck Version 4.4.0, support for 1992, 1993, and 1995 MEC and the 1998 IECC is no longer included, but those sections remain in this document for reference purposes.

Document type: Reports and Studies
Publication Date: August 2015
Focus: Code Development, Residential

This document lays out the U.S. Department of Energy’s (DOE’s) methodology for evaluating the cost-effectiveness of energy code and standard proposals and editions. The evaluation is applied to new provisions or editions of ANSI/ASHRAE/IES Standard 90.1 and the International Energy Conservation Code. The methodology follows standard life-cycle cost (LCC) economic analysis procedures. Cost-effectiveness evaluation requires three steps: 1) evaluating the energy and energy cost savings of code changes, 2) evaluating the incremental and replacement costs related to the changes, and 3) determining the cost-effectiveness of energy code changes based on those costs and savings over time.

This document was originally published in January, 2015. Revision 1 was published in August, 2015, and is available at: commercial_methodology.pdf.

Document type: Reports and Studies
Publication Date: April 2012
Focus: Code Development

The U.S. Department of Energy's (DOE's) Building Energy Codes Program has developed and established a methodology for evaluating the energy and economic performance of residential energy codes. This methodology serves two primary purposes. First, as DOE participates in the consensus processes of the International Code Council, the methodology described herein will be used by DOE to ensure that its proposals are both energy efficient and cost effective. Second, when a new version of the International Energy Conservation Code is published, DOE will evaluate the new code as a whole to establish expected energy savings and cost effectiveness, which will help states and local jurisdictions interested in adopting the new codes. DOE's measure of cost-effectiveness balances longer-term energy savings against additions to initial costs through a life-cycle cost perspective.

2015 Revision to this document was posted August 12, 2015. This document is an update to the...

Document type: Technical Assistance report
Publication Date: September 2006
Focus: Adoption

The state of Michigan asked the U.S. Department of Energy to analyze the potential energy effect and cost-effectiveness of the lighting requirements in ASHRAE Standard 90.1-2004 as they consider adoption of this energy code in place of ASHRAE Standard 90.1-1999. The primary change of interest in the lighting section of the 90.1-2004 Standard is the set of revised interior lighting power densities that provide for stricter lighting compliance levels.

Document type: State-specific
Publication Date: November 2010
Focus: Adoption

Rules governing the energy efficiency for the design and construction of buildings and structures, not including residential buildings, shall be those contained in the 2009 International Energy Conservation Code (IECC), section 501.1 and ASHRAE Standard 90.1-2007, including appendices A, B, C, and D. With the amendments noted, Section 501.1 of the IECC and ASHRAE Standard 90.1-2007 are adopted in these rules by reference.

Document type: State-specific
Publication Date: July 2013
Focus: Adoption

The State of Michigan adopted the 2009 International Energy Conservation Code for residential construction, which became effective March 9, 2011.

The State of Michigan adopted the ASHRAE 90.1-2007 standard for commercial construction, which became effective March 9, 2011.

Document type: State-specific
Publication Date: July 2013
Focus: Adoption

In compliance with Title III of the Energy Conservation and Production Act (ECPA) of 1976, as amended, this is to certify that the State of Mississippi has adopted teh ASHRAE Standard 90.1-2010 for non-residential buildings.

Document type: State-specific
Publication Date: July 2013
Focus: Adoption

In reference to Title III of the Energy Conservation and Production Act (ECPA) of 1976, as amended, this letter serves to certify the State of Mississippi's request for an extension of time to adopt a residential energy code which is equivalent to the 2009 version of the International Energy Conservation Code for low-rise residential buildings.

Document type: State-specific, Technical Assistance report
Publication Date: March 2007
Focus: Adoption

At the request of the Montana Energy Office, the U.S. Department of Energy’s Building Energy Codes Program undertook an analysis of the energy savings associated with slab insulation in small commercial buildings.

Document type: Model Data
Publication Date: April 2011
Focus: Code Development

This speadsheet provides a summary of the percentage of energy savings with plug loads for the ASHRAE Standard 90.1 Prototype Building Models.

Document type: Analysis
Publication Date: June 2015
Focus: Code Development

This analysis focuses on one- and two-family dwellings, townhomes, and low-rise multifamily residential buildings based on the International Energy Conservation Code (IECC). PNNL evaluated the cost-effectiveness of the changes in the prescriptive and mandatory residential provisions of the 2015 edition of the IECC, hereafter referred to as the 2015 IECC, compared to those in the 2012 and 2009 IECC. The current analysis builds on the PNNL technical report titled 2015 IECC: Energy Savings Analysis (Mendon et al. 2015) which identified the prescriptive and mandatory changes introduced by the 2015 IECC compared to the 2012 IECC and determined their energy savings impact.

Document type: Reports and Studies
Publication Date:
Focus: Code Development

More than 200,000 homes are factory built in the United States each year to the federally preemptive Manufactured Housing Construction and Safety Standards, mandated by the U.S. Department of Housing and Urban Development (HUD). This paper analyzes national energy use and savings potential from improvements to thermal distribution system efficiency, thermal envelopes, and heating, ventilation and air conditioning (HVAC) equipment over what is currently required by HUD code. Estimated energy savings over current HUD code are provided for four cases: National Fire Protection Association Standard 501-2005, the 2006 International Energy Conservation Code, the U.S. Environmental Protection Agency’s ENERGY STAR manufactured housing guidelines , and Best Practice, based on the U.S. Department of Energy’s Building America Industrialized Housing Partnership program home built in the Pacific Northwest. Savings estimates are also provided from improved HVAC system efficiencies, such as using...

Document type: State-specific
Publication Date:
Focus: Adoption

In compliance with Title III of the Energy Conservation and Production Act (ECPA) of 1976, as amended, this letter is to certify that the State of Nebraska has updated the Nebraska Enery Code, which references the 2009 version of the International Energy Conservation Code, as well as ASHRAE Standard 90.1-2007 for non-residential buildings.

Document type: State-specific
Publication Date: September 2012
Focus: Compliance, Enforcement

This Guide is designed to assist state and local code jurisdictions in achieving statewide compliance with the 2009 International Energy Conservation ...

Document type: State-specific
Publication Date: June 2013
Focus: Adoption

In response to the U.S. Department of Energy's July 20, 2011 notice of determination in the Federal Register regarding ANSI/ASHRAE/IESNA 90.1-2007, the State of Nevada certifies that it has reviewed the provisions of Nevada's building energy codes and has adopted the 2009 International Energy Conservation Code (IECC) with reference to ASHRAE 90.1-2007 as the statewide minimum standard for commercial buildings, effective July 1, 2012.

Document type: State-specific
Publication Date: June 2013
Focus: Adoption

In response to the U.S. Department of Energy's July 19, 2011 notice of determination in the Federal Register regarding the 2009 International Energy Conservation Code (IECC), the State of Nevada certifies that it has reviewed the provisions of Nevada's residential energy codes; conducted a regulation workshop and three regulation hearings to seek public comment as required pursuant to Nevada Revised Statute (NRS); and has adopted the 2009 IECC as the statewide minimum standard, effective July 1, 2012.

Document type: State-specific
Publication Date:
Focus: Adoption

Residential energy code application for certification of compliance for new construction, additions or renovations.

Document type: State-specific
Publication Date: July 2013
Focus: Adoption

The New Hampshire Office of Energy and Planning hereby certifies that the State of New Hampshire has a residential building energy code that meets the requirements of the 2009 IECC, and a commercial building energy code that meets ASHRAE 90.1-2007.

Document type: State-specific
Publication Date: August 2011
Focus: Adoption

In compliance with the Title III of the Energy Conservation and Production Act of 1976, as amended, this document certifies that the state of New Jersey has adopted the 2009 International Energy Conservation Code (IECC) for low-rise residential buildings, along with ASHRAE Standard 90.1-2007 for commercial buildings and all other residential buildings not covered under the 2009 IECC.

Document type: State-specific, Technical Assistance report
Publication Date: January 2003
Focus: Adoption

This paper presents an assessment of the energy savings and economic impact for New Mexico to adopt the 2000 International Energy Conservation Code. As of the writing of this report, the state of New Mexico bases its commercial building energy code on the 1986 Model Energy Code, which in turn references ASHRAE Standard 90a-1980 for the commercial building portion of the energy code.

Document type: State-specific
Publication Date: July 2013
Focus: Adoption

This letter certifies New Mexico's compliance with the Energy Conservation and Production Act of 1976 (ECPA), as amended . The State of New Mexico has adopted the New Mexico Energy Conservation Code, which references the 2009 version of the International Energy Conservation Code with amendments for residential buildings as well as ASHRAE Standard 90.1-2007 for commercial buildings.

Document type: State-specific, Technical Assistance report
Publication Date: August 2007
Focus: Adoption

At the request of the New York State Energy Research and Development Authority and New York State Department of State, the U.S. Department of Energy's Building Energy Codes Program undertook an analysis of the energy savings and cost impacts associated with the proposed adoption of ASHRAE Standard 90.1-2004, and compared it with the requirements based on ASHRAE Standards 90.1-1999 and 90.1-2001.

Document type: State-specific, Technical Assistance report
Publication Date: April 2004
Focus: Adoption

The state of New York asked the U.S. Department of Energy to evaluate the cost-effectiveness of the requirement for heat recovery for service water heating that exists in the 2003 International Energy Conservation Code to determine whether this requirement should be adopted into the New York State Energy code.

Document type: State-specific, Technical Assistance report
Publication Date: September 2004
Focus: Adoption

The New York State Department of State requested the U.S. Department of Energy (DOE) compare the effects on energy usage as a result of implementation of the 2004 Supplement to the International Energy Conservation Code with the current New York code. The comparison had to determine whether additional costs of compliance with the proposal would be equal to or less than the present value of anticipated energy cost savings over a 10-year period. Under DOE's direction, Pacific Northwest National Laboratory completed the requested assessment of the potential code upgrade.

Document type: State-specific, Technical Assistance report
Publication Date: June 2009
Focus: Adoption

The state of New York requested that the U.S. Department of Energy's (DOE's) Building Energy Codes Program (BECP) provide an analysis of the impacts of adoption of ASHRAE Standard 90.1-2007. New York State is unique among states in requiring a ten-year payback for energy code measures. BECP based this analysis on the results of a nationwide, state-by-state code comparison for DOE. This analysis indicates that the adoption of ASHRAE Standard 90.1-2007 is cost-effective under New York’s requirements for all buildings in New York.

Document type: State-specific, Technical Assistance report
Publication Date: June 2004
Focus: Adoption

The state of New York asked the U.S. Department of Energy to analyze the potential energy effect and cost-effectiveness of the lighting requirements in the 2003 International Energy Conservation Code as they consider adoption of this energy code. The new provisions of interest in the lighting section of the 2003 IECC include new lighting power densities and requirements for automatic lighting shutoff controls.

Document type: State-specific
Publication Date: July 2013
Focus: Adoption

In compliance with Title III of the Energy Conservation and Production Act (ECPA) of 1976, as amended, this is to certify that the State of New York has adopted the 2010 edition of the Energy Conservation Construction Code of New York State (the "2010 ECCCNYS") as New York State's building energy code for residential buildings and non-residential (commercial) buildings.

With regard to residential buildings, the 2010 ECCCNYS is based on, and is equivalent to or more stringent than, the 2009 version of the International Energy Conservation Code.

With regard to commercial buildings, the 2010 ECCCNYS is equivalent to or more stringent than ASHRAE 90.1-2007.

Document type: Code Notes
Publication Date: June 2011
Focus: Compliance

The use of header stock over windows and doors in nonbearing walls is typical construction practice throughout the industry. But a single two-inch by four-inch board is allowed to be used as a header in non-load bearing wall systems..

Document type: Reports and Studies, State-specific
Publication Date: March 2000
Focus: Adoption

This study focuses on verifying that buildings are designed and built to comply with the energy code requirements. The goal of the recommended program is to collect sufficient information to describe construction characteristics and practices related to energy efficiency in new residential and non-residential construction in a representative sample of North Carolina city and county code jurisdictions.

Document type: State-specific
Publication Date: July 2013
Focus: Adoption

In response to the U.S. Department of Energy's July 20, 2011 notice of determination in the Federal Register, North Carolina certifies that it has reviewed and updated the provisions of the 2012 North Carolina Energy Conservation Code governing commercial building energy efficiency to meet or exceed the requirements of ASHRAE Standard 90.1-2007.  An amendment was later adopted that will require compliance with ASHRAE Standard 90.1-2010, effective January 1, 2015.

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